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SubjectRe: [PATCH 2/2] spi: spi-ti-qspi: Use bounce buffer if read buffer is not DMA'ble
Hi Vignesh,

[auto build test WARNING on spi/for-next]
[also build test WARNING on v4.11-rc5 next-20170404]
[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/Vignesh-R/spi-ti-qspi-Handle-vmalloc-d-buffers/20170403-030332
base: https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-next
config: tile-allmodconfig (attached as .config)
compiler: tilegx-linux-gcc (GCC) 4.6.2
reproduce:
wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
make.cross ARCH=tile

All warnings (new ones prefixed by >>):

drivers//spi/spi-ti-qspi.c: In function 'ti_qspi_dma_bounce_buffer':
drivers//spi/spi-ti-qspi.c:440:20: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
>> drivers//spi/spi-ti-qspi.c:449:21: warning: comparison of distinct pointer types lacks a cast [enabled by default]
drivers//spi/spi-ti-qspi.c:455:10: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]

vim +449 drivers//spi/spi-ti-qspi.c

434 }
435
436 static int ti_qspi_dma_bounce_buffer(struct ti_qspi *qspi,
437 struct spi_flash_read_message *msg)
438 {
439 size_t readsize = msg->len;
> 440 unsigned int to = (unsigned int)msg->buf;
441 dma_addr_t dma_src = qspi->mmap_phys_base + msg->from;
442 int ret = 0;
443
444 /*
445 * Use bounce buffer as FS like jffs2, ubifs may pass
446 * buffers that does not belong to kernel lowmem region.
447 */
448 while (readsize != 0) {
> 449 size_t xfer_len = min(QSPI_DMA_BUFFER_SIZE, readsize);
450
451 ret = ti_qspi_dma_xfer(qspi, qspi->rx_bb_dma_addr,
452 dma_src, xfer_len);

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