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spi: loopback-test: Fix kfree() NULL pointer error. 

Here, rx/tx allocation can fail. So avoid kvfree call
with NULL pointer.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Arvind Yadav 2017-06-20 15:00:53 +05:30 committed by Mark Brown
parent 478de2ba0d
commit 704c3098e4
1 changed files with 6 additions and 6 deletions
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12
drivers/spi/spi-loopback-test.c
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@ -1021,10 +1021,9 @@ int spi_test_run_tests(struct spi_device *spi,
rx = vmalloc(SPI_TEST_MAX_SIZE_PLUS); rx = vmalloc(SPI_TEST_MAX_SIZE_PLUS);
else else
rx = kzalloc(SPI_TEST_MAX_SIZE_PLUS, GFP_KERNEL); rx = kzalloc(SPI_TEST_MAX_SIZE_PLUS, GFP_KERNEL);
if (!rx) { if (!rx)
ret = -ENOMEM; return -ENOMEM;
goto out;
}
if (use_vmalloc) if (use_vmalloc)
tx = vmalloc(SPI_TEST_MAX_SIZE_PLUS); tx = vmalloc(SPI_TEST_MAX_SIZE_PLUS);
@ -1032,7 +1031,7 @@ int spi_test_run_tests(struct spi_device *spi,
tx = kzalloc(SPI_TEST_MAX_SIZE_PLUS, GFP_KERNEL); tx = kzalloc(SPI_TEST_MAX_SIZE_PLUS, GFP_KERNEL);
if (!tx) { if (!tx) {
ret = -ENOMEM; ret = -ENOMEM;
goto out; goto err_tx;
} }
/* now run the individual tests in the table */ /* now run the individual tests in the table */
@ -1057,8 +1056,9 @@ int spi_test_run_tests(struct spi_device *spi,
} }
out: out:
kvfree(rx);
kvfree(tx); kvfree(tx);
err_tx:
kvfree(rx);
return ret; return ret;
} }
EXPORT_SYMBOL_GPL(spi_test_run_tests); EXPORT_SYMBOL_GPL(spi_test_run_tests);