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spi: loopback-test: Simplify strange loopback value check

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Apply De Morgan's Theorem and drop superfluous parentheses to simplify
the check for strange loopback values.
While at it, add the missing zero in the related comment.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/da612090f543c8c7cc99fb9dc6ef4abc9560abe4.1746184293.git.geert+renesas@glider.be
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Geert Uytterhoeven
2025-05-02 13:12:39 +02:00
committed by Mark Brown
parent 2dbe74c63c
commit 233d740e3a
1 changed files with 2 additions and 2 deletions
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4
drivers/spi/spi-loopback-test.c
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@@ -635,8 +635,8 @@ static int spi_test_check_loopback_result(struct spi_device *spi,
} else {
/* first byte received */
txb = ((u8 *)xfer->rx_buf)[0];
/* first byte may be 0 or xff */
if (!((txb == 0) || (txb == 0xff))) {
/* first byte may be 0 or 0xff */
if (txb != 0 && txb != 0xff) {
dev_err(&spi->dev,
"loopback strangeness - we expect 0x00 or 0xff, but not 0x%02x\n",
txb);