From patchwork Tue Feb 13 10:05:00 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arnd Bergmann X-Patchwork-Id: 13554879 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 15DBC249F9; Tue, 13 Feb 2024 10:05:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707818725; cv=none; b=JYIjAR8jigtTyr3BM5C2xYe/Gq8T7a1NXRuGiCM3+VBCxH4j8ny6fi6S3hqQFasUVyyat31u5+5fP3vm5y1NxuydA10C7PD+gY5BBRL9HZ1Mx28JoghJGoVgLPs9xH1mt6zv5hnN9ddEGQIX26Nelww1MPDlBKRXCw9Of/14o9I= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707818725; c=relaxed/simple; bh=emMWihdG3YmlZB9a2YuEdmHk2vnpD5HUAdSQ+KiaJ6U=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=Mg+pmQJj8MeBm3+nFYjXGW4fiqlA4GGDXkS7pyBdBP+7xiTslp6YKeuBGNNrQ8ssTGqtpf+3vGFeP1PWvrXRBlJAHQgksPXeqhQUmY1FCpHgin0laJxRnnPX8xvZOCgBmcJbUz9+6kn0yOOFZ5bsNHP8z/IaByDnfTq0Vj5kBvU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=g6XMpU/c; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="g6XMpU/c" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0099EC433F1; Tue, 13 Feb 2024 10:05:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1707818724; bh=emMWihdG3YmlZB9a2YuEdmHk2vnpD5HUAdSQ+KiaJ6U=; h=From:To:Cc:Subject:Date:From; b=g6XMpU/c/C4zVcOqAnH8qctNqQfSeyU0RRegFvSKE0ZOfDT9JRvhc45z2WxRcO50U ufVpF1BdcdKjziP4BCnnpc0oMsk3NEfq32rz3QDPO8lumirpZeAAOZ+5ZyhJ047969 Te3bLskKkIMIA0if6gYRiRtHlMjMMeSBpy/73c3Gjv0e8y58ujuLR7ZHPQRu2m29CV 5iyFbmwZOP9PzSJS9IyOZymtqc8kKKCEy6fnJQw4LMKP/k4YrWwUi5cNbtJUqeTAzv yqI04ygtWkit92oUjQ3EAlS33l0a/3wIjSbJXnqqBJ7gSSG9Agx3xanox8lTR977hX pWXprkxTWG9Wg== From: Arnd Bergmann To: "James E.J. Bottomley" , "Martin K. Petersen" Cc: Arnd Bergmann , Nathan Chancellor , Nick Desaulniers , Bill Wendling , Justin Stitt , James Bottomley , Naresh Kumar Inna , linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, llvm@lists.linux.dev Subject: [PATCH] scsi: csiostor: avoid function pointer casts Date: Tue, 13 Feb 2024 11:05:00 +0100 Message-Id: <20240213100518.457623-1-arnd@kernel.org> X-Mailer: git-send-email 2.39.2 Precedence: bulk X-Mailing-List: linux-scsi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Arnd Bergmann csiostor uses function pointer casts to keep the csio_ln_ev state machine hidden, but this causes warnings about control flow integrity (KCFI) violations in clang-16 and higher: drivers/scsi/csiostor/csio_lnode.c:1098:33: error: cast from 'void (*)(struct csio_lnode *, enum csio_ln_ev)' to 'csio_sm_state_t' (aka 'void (*)(void *, unsigned int)') converts to incompatible function type [-Werror,-Wcast-function-type-strict] 1098 | return (csio_get_state(ln) == ((csio_sm_state_t)csio_lns_ready)); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/scsi/csiostor/csio_lnode.c:1369:29: error: cast from 'void (*)(struct csio_lnode *, enum csio_ln_ev)' to 'csio_sm_state_t' (aka 'void (*)(void *, unsigned int)') converts to incompatible function type [-Werror,-Wcast-function-type-strict] 1369 | if (csio_get_state(ln) == ((csio_sm_state_t)csio_lns_uninit)) { | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/scsi/csiostor/csio_lnode.c:1373:29: error: cast from 'void (*)(struct csio_lnode *, enum csio_ln_ev)' to 'csio_sm_state_t' (aka 'void (*)(void *, unsigned int)') converts to incompatible function type [-Werror,-Wcast-function-type-strict] 1373 | if (csio_get_state(ln) == ((csio_sm_state_t)csio_lns_ready)) { | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/scsi/csiostor/csio_lnode.c:1377:29: error: cast from 'void (*)(struct csio_lnode *, enum csio_ln_ev)' to 'csio_sm_state_t' (aka 'void (*)(void *, unsigned int)') converts to incompatible function type [-Werror,-Wcast-function-type-strict] 1377 | if (csio_get_state(ln) == ((csio_sm_state_t)csio_lns_offline)) { | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Move the enum into a shared header so the correct types can be used without the need for casts. Fixes: a3667aaed569 ("[SCSI] csiostor: Chelsio FCoE offload driver") Signed-off-by: Arnd Bergmann --- drivers/scsi/csiostor/csio_defs.h | 18 ++++++++++++++++-- drivers/scsi/csiostor/csio_lnode.c | 8 ++++---- drivers/scsi/csiostor/csio_lnode.h | 13 ------------- 3 files changed, 20 insertions(+), 19 deletions(-) diff --git a/drivers/scsi/csiostor/csio_defs.h b/drivers/scsi/csiostor/csio_defs.h index c38017b4af98..e50e93e7fe5a 100644 --- a/drivers/scsi/csiostor/csio_defs.h +++ b/drivers/scsi/csiostor/csio_defs.h @@ -73,7 +73,21 @@ csio_list_deleted(struct list_head *list) #define csio_list_prev(elem) (((struct list_head *)(elem))->prev) /* State machine */ -typedef void (*csio_sm_state_t)(void *, uint32_t); +struct csio_lnode; + +/* State machine evets */ +enum csio_ln_ev { + CSIO_LNE_NONE = (uint32_t)0, + CSIO_LNE_LINKUP, + CSIO_LNE_FAB_INIT_DONE, + CSIO_LNE_LINK_DOWN, + CSIO_LNE_DOWN_LINK, + CSIO_LNE_LOGO, + CSIO_LNE_CLOSE, + CSIO_LNE_MAX_EVENT, +}; + +typedef void (*csio_sm_state_t)(struct csio_lnode *ln, enum csio_ln_ev evt); struct csio_sm { struct list_head sm_list; @@ -83,7 +97,7 @@ struct csio_sm { static inline void csio_set_state(void *smp, void *state) { - ((struct csio_sm *)smp)->sm_state = (csio_sm_state_t)state; + ((struct csio_sm *)smp)->sm_state = state; } static inline void diff --git a/drivers/scsi/csiostor/csio_lnode.c b/drivers/scsi/csiostor/csio_lnode.c index d5ac93897023..5b3ffefae476 100644 --- a/drivers/scsi/csiostor/csio_lnode.c +++ b/drivers/scsi/csiostor/csio_lnode.c @@ -1095,7 +1095,7 @@ csio_handle_link_down(struct csio_hw *hw, uint8_t portid, uint32_t fcfi, int csio_is_lnode_ready(struct csio_lnode *ln) { - return (csio_get_state(ln) == ((csio_sm_state_t)csio_lns_ready)); + return (csio_get_state(ln) == csio_lns_ready); } /*****************************************************************************/ @@ -1366,15 +1366,15 @@ csio_free_fcfinfo(struct kref *kref) void csio_lnode_state_to_str(struct csio_lnode *ln, int8_t *str) { - if (csio_get_state(ln) == ((csio_sm_state_t)csio_lns_uninit)) { + if (csio_get_state(ln) == csio_lns_uninit) { strcpy(str, "UNINIT"); return; } - if (csio_get_state(ln) == ((csio_sm_state_t)csio_lns_ready)) { + if (csio_get_state(ln) == csio_lns_ready) { strcpy(str, "READY"); return; } - if (csio_get_state(ln) == ((csio_sm_state_t)csio_lns_offline)) { + if (csio_get_state(ln) == csio_lns_offline) { strcpy(str, "OFFLINE"); return; } diff --git a/drivers/scsi/csiostor/csio_lnode.h b/drivers/scsi/csiostor/csio_lnode.h index 372a67d122d3..607698a0f063 100644 --- a/drivers/scsi/csiostor/csio_lnode.h +++ b/drivers/scsi/csiostor/csio_lnode.h @@ -53,19 +53,6 @@ extern int csio_fcoe_rnodes; extern int csio_fdmi_enable; -/* State machine evets */ -enum csio_ln_ev { - CSIO_LNE_NONE = (uint32_t)0, - CSIO_LNE_LINKUP, - CSIO_LNE_FAB_INIT_DONE, - CSIO_LNE_LINK_DOWN, - CSIO_LNE_DOWN_LINK, - CSIO_LNE_LOGO, - CSIO_LNE_CLOSE, - CSIO_LNE_MAX_EVENT, -}; - - struct csio_fcf_info { struct list_head list; uint8_t priority;