linux-kernel - [PATCH] mtd: spi-nor: cadence-quadspi: make return type fit wait_for_completion

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Message-Id: <1532189293-5975-1-git-send-email-hofrat@osadl.org>
Date:   Sat, 21 Jul 2018 18:08:13 +0200
From:   Nicholas Mc Guire <hofrat@...dl.org>
To:     Graham Moore <grmoore@...nsource.altera.com>
Cc:     Vignesh R <vigneshr@...com>, Marek Vasut <marek.vasut@...il.com>,
        David Woodhouse <dwmw2@...radead.org>,
        Brian Norris <computersforpeace@...il.com>,
        Boris Brezillon <boris.brezillon@...tlin.com>,
        Richard Weinberger <richard@....at>,
        linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Nicholas Mc Guire <hofrat@...dl.org>
Subject: [PATCH] mtd: spi-nor: cadence-quadspi: make return type fit wait_for_completion_timeout

wait_for_completion_timeout returns an unsigned long not int. declare a
suitably type timeout and fix up assignment and check.

Signed-off-by: Nicholas Mc Guire <hofrat@...dl.org>
Reported-by: Vignesh R <vigneshr@...com>
Fixes: 140623410536 ("mtd: spi-nor: Add driver for Cadence Quad SPI Flash Controller")
---

Given that CQSPI_TIMEOUT_MS is < INT_MAX the type conversion is actually safe
here but it is cleaner to use proper types.

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 | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/mtd/spi-nor/cadence-quadspi.c b/drivers/mtd/spi-nor/cadence-quadspi.c
index d7e10b3..ce5f840 100644
--- a/drivers/mtd/spi-nor/cadence-quadspi.c
+++ b/drivers/mtd/spi-nor/cadence-quadspi.c
@@ -622,6 +622,7 @@ static int cqspi_indirect_write_execute(struct spi_nor *nor, loff_t to_addr,
 	unsigned int remaining = n_tx;
 	unsigned int write_bytes;
 	int ret;
+	unsigned long timeout;
 
 	writel(to_addr, reg_base + CQSPI_REG_INDIRECTWRSTARTADDR);
 	writel(remaining, reg_base + CQSPI_REG_INDIRECTWRBYTES);
@@ -649,10 +650,10 @@ static int cqspi_indirect_write_execute(struct spi_nor *nor, loff_t to_addr,
 		iowrite32_rep(cqspi->ahb_base, txbuf,
 			      DIV_ROUND_UP(write_bytes, 4));
 
-		ret = wait_for_completion_timeout(&cqspi->transfer_complete,
-						  msecs_to_jiffies
-						  (CQSPI_TIMEOUT_MS));
-		if (!ret) {
+		timeout = wait_for_completion_timeout(&cqspi->transfer_complete,
+						      msecs_to_jiffies
+						      (CQSPI_TIMEOUT_MS));
+		if (!timeout) {
 			dev_err(nor->dev, "Indirect write timeout\n");
 			ret = -ETIMEDOUT;
 			goto failwr;
-- 
2.1.4