| Message ID | 1444853545-59868-2-git-send-email-andriy.shevchenko@linux.intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Wed, Oct 14, 2015 at 11:12:16PM +0300, Andy Shevchenko wrote: > The following warning occurs when DW SPI is compiled as module and it's a PCI > device. On removal stage pcibios_free_irq() called earlier than free_irq() due > to the latter is called at managed resources free strage. Seems better to just convert to request_irq()?
diff --git a/drivers/spi/spi-dw.c b/drivers/spi/spi-dw.c index 1153d36..254ffdf 100644 --- a/drivers/spi/spi-dw.c +++ b/drivers/spi/spi-dw.c @@ -571,10 +571,14 @@ EXPORT_SYMBOL_GPL(dw_spi_add_host); void dw_spi_remove_host(struct dw_spi *dws) { + struct spi_master *master = dws->master; + if (!dws) return; dw_spi_debugfs_remove(dws); + devm_free_irq(master->dev.parent, dws->irq, master); + if (dws->dma_ops && dws->dma_ops->dma_exit) dws->dma_ops->dma_exit(dws); spi_enable_chip(dws, 0);
The following warning occurs when DW SPI is compiled as module and it's a PCI device. On removal stage pcibios_free_irq() called earlier than free_irq() due to the latter is called at managed resources free strage. ------------[ cut here ]------------ WARNING: CPU: 1 PID: 1003 at /home/andy/prj/linux/fs/proc/generic.c:575 remove_proc_entry+0x118/0x150() remove_proc_entry: removing non-empty directory 'irq/38', leaking at least 'dw_spi1' Modules linked in: spi_dw_midpci(-) spi_dw [last unloaded: dw_dmac_core] CPU: 1 PID: 1003 Comm: modprobe Not tainted 4.3.0-rc5-next-20151013+ #32 00000000 00000000 f5535d70 c12dc220 f5535db0 f5535da0 c104e912 c198a6bc f5535dcc 000003eb c198a638 0000023f c11b4098 c11b4098 f54f1ec8 f54f1ea0 f642ba20 f5535db8 c104e96e 00000009 f5535db0 c198a6bc f5535dcc f5535df0 Call Trace: [<c12dc220>] dump_stack+0x41/0x61 [<c104e912>] warn_slowpath_common+0x82/0xb0 [<c11b4098>] ? remove_proc_entry+0x118/0x150 [<c11b4098>] ? remove_proc_entry+0x118/0x150 [<c104e96e>] warn_slowpath_fmt+0x2e/0x30 [<c11b4098>] remove_proc_entry+0x118/0x150 [<c109b96a>] unregister_irq_proc+0xaa/0xc0 [<c109575e>] free_desc+0x1e/0x60 [<c10957d2>] irq_free_descs+0x32/0x70 [<c109b1a0>] irq_domain_free_irqs+0x120/0x150 [<c1039e8c>] mp_unmap_irq+0x5c/0x60 [<c16277b0>] intel_mid_pci_irq_disable+0x20/0x40 [<c1627c7f>] pcibios_free_irq+0xf/0x20 [<c13189f2>] pci_device_remove+0x52/0xb0 [<c13f6367>] __device_release_driver+0x77/0x100 [<c13f6da7>] driver_detach+0x87/0x90 [<c13f5eaa>] bus_remove_driver+0x4a/0xc0 [<c128bf0d>] ? selinux_capable+0xd/0x10 [<c13f7483>] driver_unregister+0x23/0x60 [<c10bad8a>] ? find_module_all+0x5a/0x80 [<c1317413>] pci_unregister_driver+0x13/0x60 [<f80ac654>] dw_spi_driver_exit+0xd/0xf [spi_dw_midpci] [<c10bce9a>] SyS_delete_module+0x17a/0x210 Explicitly call free_irq() at removal stage of the DW SPI driver. Fixes: 04f421e7b0b1 (spi: dw: use managed resources) Cc: stable@vger.kernel.org Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> --- drivers/spi/spi-dw.c | 4 ++++ 1 file changed, 4 insertions(+)