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chipset_enable.c: Validate physmap() return rcrb value
Validate the physical mapping in enable_flash_silvermont(). Change-Id: Icc5a799a06b3f310d9a191fa5eb99b255b20d79d Signed-off-by: Edward O'Callaghan <quasisec@google.com> Reviewed-on: https://review.coreboot.org/c/flashrom/+/48225 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Sam McNally <sammc@google.com> Reviewed-by: Angel Pons <th3fanbus@gmail.com> Reviewed-on: https://review.coreboot.org/c/flashrom/+/67843 Reviewed-by: Felix Singer <felixsinger@posteo.net> Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>
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@ -920,6 +920,8 @@ static int enable_flash_silvermont(struct pci_dev *dev, const char *name)
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/* Handle GCS (in RCRB) */
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void *rcrb = physmap("BYT RCRB", rcba, 4);
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if (rcrb == ERROR_PTR)
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return ERROR_FATAL;
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enable_flash_ich_report_gcs(dev, ich_generation, rcrb);
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physunmap(rcrb, 4);
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