From patchwork Thu Oct 17 13:05:06 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Niklas Neronin X-Patchwork-Id: 13839999 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.14]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 309F61DDC23 for ; Thu, 17 Oct 2024 13:07:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.14 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729170449; cv=none; b=Bfl7v10yHCnilCai7L+MOQq+7BQMBv2foh/aKd0PCExYo9zgDuA0BmlLAHYPZMH6h1/J74GGRaGI/t4KSLkMle7gMGBLRFIkXXgCv7Ssz4XxmAEL49SShI6/npwvYynC4J/2e/+tjvFF1Vsf8eRcwBdWRen9BC7ZaYnXd/66EH8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729170449; c=relaxed/simple; bh=+yKwzp8zmeEWPUGogpPmzgX6GaQlsSAaDknlIJFpnUU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=BKqEZG/VsrCRm5YpE4GaHxpOMFX5W8d8cHSH1ZAkHlSPtjIDG59gt44nIgpNeAU7FNqIF5GpBwKvo3lcQhu56v2x8yfYtZA91M10qa6OWEEGWPh68TMt4L1LsMLIT/1J5AC9E7FCRUGRvOnPPEvYFKdZo0C9E8dT9HSUGO5l2A0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=none smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=Uvc+MswO; arc=none smtp.client-ip=198.175.65.14 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="Uvc+MswO" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1729170446; x=1760706446; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=+yKwzp8zmeEWPUGogpPmzgX6GaQlsSAaDknlIJFpnUU=; b=Uvc+MswOiogyxc0d428NXQV2+5xqXzco/vd93YBmrpMJgbQNg3KGgj2R tMGPT/5d9QgQJdYlKYUpYOZ7nvw0hPeqSbX9V53eNz2QazFqXsv7rRhaQ nVzdrAFTnSoprD8YRrcER4TCcwzuTWqEQ6VzDKMqcrFh/mCnAv5pRLxcq TwFrQ3UAMhdN0Oh1T0cvCC7NE4K1AD0Jtw5hqyHyR9expiROT0oV1wWdu vySRas4HBuXfKEM0uyH0JYF7Co2EoRVnOl0wXqnCVYSnrsu13FUb1B8mq 9IoMpVSf2mjK9qwwI5A2+bzFvgxUG4vBtiROLVYgK1y2JhqZGiebmguJs Q==; X-CSE-ConnectionGUID: RI4X1te2RVOqCfN1+Pcygg== X-CSE-MsgGUID: klFI0tZ1TZ68mAsDzBjwpQ== X-IronPort-AV: E=McAfee;i="6700,10204,11227"; a="32452112" X-IronPort-AV: E=Sophos;i="6.11,210,1725346800"; d="scan'208";a="32452112" Received: from orviesa002.jf.intel.com ([10.64.159.142]) by orvoesa106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Oct 2024 06:07:24 -0700 X-CSE-ConnectionGUID: Z0mKS/RHQ3Orh4BiBgELQA== X-CSE-MsgGUID: PoeRRwekSw+8JOqc5OH71g== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.11,210,1725346800"; d="scan'208";a="109354610" Received: from black.fi.intel.com ([10.237.72.28]) by orviesa002.jf.intel.com with ESMTP; 17 Oct 2024 06:07:23 -0700 Received: by black.fi.intel.com (Postfix, from userid 1058) id 46B3B3D2; Thu, 17 Oct 2024 16:07:22 +0300 (EEST) From: Niklas Neronin To: mathias.nyman@linux.intel.com Cc: linux-usb@vger.kernel.org, Niklas Neronin Subject: [PATCH 6/8] usb: xhci: refactor xhci_td_cleanup() to return void Date: Thu, 17 Oct 2024 16:05:06 +0300 Message-ID: <20241017130508.1293021-7-niklas.neronin@linux.intel.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20241017130508.1293021-1-niklas.neronin@linux.intel.com> References: <20241017130508.1293021-1-niklas.neronin@linux.intel.com> Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 The function is modified to return 'void' instead of an integer since it invariably returns '0'. Additionally, multiple functions which only return xhci_td_cleanup() are also refactored to return void. This change eliminates the need for callers to handle a return value that does not convey meaningful information and improve code readability, as it becomes immediately clear that the function does not produce a significant output. Signed-off-by: Niklas Neronin --- drivers/usb/host/xhci-ring.c | 59 +++++++++++++++++------------------- 1 file changed, 28 insertions(+), 31 deletions(-) diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index e2e20ae424ad..13eadee89839 100644 --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -813,8 +813,8 @@ static void xhci_unmap_td_bounce_buffer(struct xhci_hcd *xhci, seg->bounce_offs = 0; } -static int xhci_td_cleanup(struct xhci_hcd *xhci, struct xhci_td *td, - struct xhci_ring *ep_ring, int status) +static void xhci_td_cleanup(struct xhci_hcd *xhci, struct xhci_td *td, + struct xhci_ring *ep_ring, int status) { struct urb *urb = NULL; @@ -857,8 +857,6 @@ static int xhci_td_cleanup(struct xhci_hcd *xhci, struct xhci_td *td, status = 0; xhci_giveback_urb_in_irq(xhci, td, status); } - - return 0; } @@ -2187,9 +2185,9 @@ int xhci_is_vendor_info_code(struct xhci_hcd *xhci, unsigned int trb_comp_code) return 0; } -static int finish_td(struct xhci_hcd *xhci, struct xhci_virt_ep *ep, - struct xhci_ring *ep_ring, struct xhci_td *td, - u32 trb_comp_code) +static void finish_td(struct xhci_hcd *xhci, struct xhci_virt_ep *ep, + struct xhci_ring *ep_ring, struct xhci_td *td, + u32 trb_comp_code) { struct xhci_ep_ctx *ep_ctx; @@ -2204,7 +2202,7 @@ static int finish_td(struct xhci_hcd *xhci, struct xhci_virt_ep *ep, * stopped TDs. A stopped TD may be restarted, so don't update * the ring dequeue pointer or take this TD off any lists yet. */ - return 0; + return; case COMP_USB_TRANSACTION_ERROR: case COMP_BABBLE_DETECTED_ERROR: case COMP_SPLIT_TRANSACTION_ERROR: @@ -2230,7 +2228,7 @@ static int finish_td(struct xhci_hcd *xhci, struct xhci_virt_ep *ep, xhci_dbg(xhci, "Already resolving halted ep for 0x%llx\n", (unsigned long long)xhci_trb_virt_to_dma( td->start_seg, td->start_trb)); - return 0; + return; } /* endpoint not halted, don't reset it */ break; @@ -2238,7 +2236,7 @@ static int finish_td(struct xhci_hcd *xhci, struct xhci_virt_ep *ep, /* Almost same procedure as for STALL_ERROR below */ xhci_clear_hub_tt_buffer(xhci, td, ep); xhci_handle_halted_endpoint(xhci, ep, td, EP_HARD_RESET); - return 0; + return; case COMP_STALL_ERROR: /* * xhci internal endpoint state will go to a "halt" state for @@ -2255,7 +2253,7 @@ static int finish_td(struct xhci_hcd *xhci, struct xhci_virt_ep *ep, xhci_handle_halted_endpoint(xhci, ep, td, EP_HARD_RESET); - return 0; /* xhci_handle_halted_endpoint marked td cancelled */ + return; /* xhci_handle_halted_endpoint marked td cancelled */ default: break; } @@ -2265,7 +2263,7 @@ static int finish_td(struct xhci_hcd *xhci, struct xhci_virt_ep *ep, ep_ring->deq_seg = td->end_seg; inc_deq(xhci, ep_ring); - return xhci_td_cleanup(xhci, td, ep_ring, td->status); + xhci_td_cleanup(xhci, td, ep_ring, td->status); } /* sum trb lengths from the first trb up to stop_trb, _excluding_ stop_trb */ @@ -2285,9 +2283,9 @@ static u32 sum_trb_lengths(struct xhci_td *td, union xhci_trb *stop_trb) /* * Process control tds, update urb status and actual_length. */ -static int process_ctrl_td(struct xhci_hcd *xhci, struct xhci_virt_ep *ep, - struct xhci_ring *ep_ring, struct xhci_td *td, - union xhci_trb *ep_trb, struct xhci_transfer_event *event) +static void process_ctrl_td(struct xhci_hcd *xhci, struct xhci_virt_ep *ep, + struct xhci_ring *ep_ring, struct xhci_td *td, + union xhci_trb *ep_trb, struct xhci_transfer_event *event) { struct xhci_ep_ctx *ep_ctx; u32 trb_comp_code; @@ -2366,7 +2364,7 @@ static int process_ctrl_td(struct xhci_hcd *xhci, struct xhci_virt_ep *ep, td->urb_length_set = true; td->urb->actual_length = requested - remaining; xhci_dbg(xhci, "Waiting for status stage event\n"); - return 0; + return; } /* at status stage */ @@ -2374,15 +2372,15 @@ static int process_ctrl_td(struct xhci_hcd *xhci, struct xhci_virt_ep *ep, td->urb->actual_length = requested; finish_td: - return finish_td(xhci, ep, ep_ring, td, trb_comp_code); + finish_td(xhci, ep, ep_ring, td, trb_comp_code); } /* * Process isochronous tds, update urb packet status and actual_length. */ -static int process_isoc_td(struct xhci_hcd *xhci, struct xhci_virt_ep *ep, - struct xhci_ring *ep_ring, struct xhci_td *td, - union xhci_trb *ep_trb, struct xhci_transfer_event *event) +static void process_isoc_td(struct xhci_hcd *xhci, struct xhci_virt_ep *ep, + struct xhci_ring *ep_ring, struct xhci_td *td, + union xhci_trb *ep_trb, struct xhci_transfer_event *event) { struct urb_priv *urb_priv; int idx; @@ -2476,14 +2474,13 @@ static int process_isoc_td(struct xhci_hcd *xhci, struct xhci_virt_ep *ep, if (td->error_mid_td && ep_trb != td->end_trb) { xhci_dbg(xhci, "Error mid isoc TD, wait for final completion event\n"); td->urb_length_set = true; - return 0; + return; } - - return finish_td(xhci, ep, ep_ring, td, trb_comp_code); + finish_td(xhci, ep, ep_ring, td, trb_comp_code); } -static int skip_isoc_td(struct xhci_hcd *xhci, struct xhci_td *td, - struct xhci_virt_ep *ep, int status) +static void skip_isoc_td(struct xhci_hcd *xhci, struct xhci_td *td, + struct xhci_virt_ep *ep, int status) { struct urb_priv *urb_priv; struct usb_iso_packet_descriptor *frame; @@ -2504,15 +2501,15 @@ static int skip_isoc_td(struct xhci_hcd *xhci, struct xhci_td *td, ep->ring->deq_seg = td->end_seg; inc_deq(xhci, ep->ring); - return xhci_td_cleanup(xhci, td, ep->ring, status); + xhci_td_cleanup(xhci, td, ep->ring, status); } /* * Process bulk and interrupt tds, update urb status and actual_length. */ -static int process_bulk_intr_td(struct xhci_hcd *xhci, struct xhci_virt_ep *ep, - struct xhci_ring *ep_ring, struct xhci_td *td, - union xhci_trb *ep_trb, struct xhci_transfer_event *event) +static void process_bulk_intr_td(struct xhci_hcd *xhci, struct xhci_virt_ep *ep, + struct xhci_ring *ep_ring, struct xhci_td *td, + union xhci_trb *ep_trb, struct xhci_transfer_event *event) { struct xhci_slot_ctx *slot_ctx; u32 trb_comp_code; @@ -2555,7 +2552,7 @@ static int process_bulk_intr_td(struct xhci_hcd *xhci, struct xhci_virt_ep *ep, td->status = 0; xhci_handle_halted_endpoint(xhci, ep, td, EP_SOFT_RESET); - return 0; + return; default: /* do nothing */ break; @@ -2574,7 +2571,7 @@ static int process_bulk_intr_td(struct xhci_hcd *xhci, struct xhci_virt_ep *ep, td->urb->actual_length = 0; } - return finish_td(xhci, ep, ep_ring, td, trb_comp_code); + finish_td(xhci, ep, ep_ring, td, trb_comp_code); } /* Transfer events which don't point to a transfer TRB, see xhci 4.17.4 */