Messages in this thread Patch in this message | | | From | Nicholas Mc Guire <> | Subject | [PATCH 1/2] mtd: spi-nor: cadence-quadspi: fix timeout handling in wait_for_completion_timeout | Date | Sat, 21 Jul 2018 16:21:51 +0200 |
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wait_for_completion_timeout returns unsigned long not int so a variable of proper type is introduced. Further the check for <= 0 is ambiguous and should be == 0 here.
Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org> Fixes: ffa639e069fb ("mtd: spi-nor: cadence-quadspi: Add DMA support for direct mode reads") ---
Patch found by experimental coccinelle API conformance checker
Patch was compile tested with: socfpga_defconfig (implies CONFIG_SPI_CADENCE_QUADSPI=y)
Patch is against 4.18-rc5 (localversion-next is next-20180720)
drivers/mtd/spi-nor/cadence-quadspi.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/mtd/spi-nor/cadence-quadspi.c b/drivers/mtd/spi-nor/cadence-quadspi.c index d7e10b3..79f6a54 100644 --- a/drivers/mtd/spi-nor/cadence-quadspi.c +++ b/drivers/mtd/spi-nor/cadence-quadspi.c @@ -953,6 +953,7 @@ static int cqspi_direct_read_execute(struct spi_nor *nor, u_char *buf, enum dma_ctrl_flags flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT; dma_addr_t dma_src = (dma_addr_t)cqspi->mmap_phys_base + from; int ret = 0; + unsigned long timeout; struct dma_async_tx_descriptor *tx; dma_cookie_t cookie; dma_addr_t dma_dst; @@ -988,9 +989,9 @@ static int cqspi_direct_read_execute(struct spi_nor *nor, u_char *buf, } dma_async_issue_pending(cqspi->rx_chan); - ret = wait_for_completion_timeout(&cqspi->rx_dma_complete, - msecs_to_jiffies(len)); - if (ret <= 0) { + timeout = wait_for_completion_timeout(&cqspi->rx_dma_complete, + msecs_to_jiffies(len)); + if (timeout == 0) { dmaengine_terminate_sync(cqspi->rx_chan); dev_err(nor->dev, "DMA wait_for_completion_timeout\n"); ret = -ETIMEDOUT; -- 2.1.4
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