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SubjectRe: [PATCH v4] tty: 8250: fix a missing check for pci_ioremap_bar
Hi Aditya,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on tty/tty-testing]
[also build test WARNING on v5.1-rc2 next-20190325]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url: https://github.com/0day-ci/linux/commits/Aditya-Pakki/tty-8250-fix-a-missing-check-for-pci_ioremap_bar/20190325-151723
base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git tty-testing
reproduce:
# apt-get install sparse
make ARCH=x86_64 allmodconfig
make C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__'


sparse warnings: (new ones prefixed by >>)

>> drivers/tty/serial/8250/8250_lpss.c:207:26: sparse: incorrect type in argument 1 (different base types) @@ expected struct pci_dev *dev @@ got truct pci_dev *dev @@
drivers/tty/serial/8250/8250_lpss.c:207:26: expected struct pci_dev *dev
drivers/tty/serial/8250/8250_lpss.c:207:26: got struct device *dma_dev
>> drivers/tty/serial/8250/8250_lpss.c:207:52: sparse: cannot dereference this type
>> drivers/tty/serial/8250/8250_lpss.c:207:20: sparse: call with no type!

vim +207 drivers/tty/serial/8250/8250_lpss.c

197
198 static void qrk_serial_exit_dma(struct lpss8250 *lpss)
199 {
200 struct dw_dma_slave *param = &lpss->dma_param;
201
202 if (!param->dma_dev)
203 return;
204
205 dw_dma_remove(&lpss->dma_chip);
206
> 207 pci_iounmap(param->dma_dev, &lpss->dma_chip->regs);
208 }
209 #else /* CONFIG_SERIAL_8250_DMA */
210 static void qrk_serial_setup_dma(struct lpss8250 *lpss, struct uart_port *port) {}
211 static void qrk_serial_exit_dma(struct lpss8250 *lpss) {}
212 #endif /* !CONFIG_SERIAL_8250_DMA */
213

---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation

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