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pch_phub: return -ENODATA if ROM can't be mapped

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The error return err is not initialized for the case when pci_map_rom
fails and no ROM can me mapped.  Fix this by setting ret to -ENODATA;
(this is the same error value that is returned if the ROM data is
successfully mapped but does not match the expected ROM signature.).

Issue found from static code analysis using CoverityScan.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Colin Ian King 2016-02-27 14:52:22 +00:00 committed by Greg Kroah-Hartman
parent 7268644734
commit a75fa12823
1 changed files with 3 additions and 1 deletions
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4
drivers/misc/pch_phub.c
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@ -513,8 +513,10 @@ static ssize_t pch_phub_bin_read(struct file *filp, struct kobject *kobj,
/* Get Rom signature */
chip->pch_phub_extrom_base_address = pci_map_rom(chip->pdev, &rom_size);
if (!chip->pch_phub_extrom_base_address)
if (!chip->pch_phub_extrom_base_address) {
err = -ENODATA;
goto exrom_map_err;
}
pch_phub_read_serial_rom(chip, chip->pch_opt_rom_start_address,
(unsigned char *)&rom_signature);