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part: efi: Add debugging for the signature check

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Add a little more debugging for the initial signature check. Drop the
pointless check for NULL. Also set a log category while we are here.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2023-08-24 13:55:34 -06:00 • committed by Tom Rini
parent b2b7e6c181
commit fbd644e702
1 changed files with 11 additions and 2 deletions
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13
disk/part_efi.c
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@ -9,6 +9,9 @@
* when CONFIG_SYS_64BIT_LBA is not defined, lbaint_t is 32 bits; this * when CONFIG_SYS_64BIT_LBA is not defined, lbaint_t is 32 bits; this
* limits the maximum size of addressable storage to < 2 tebibytes * limits the maximum size of addressable storage to < 2 tebibytes
*/ */
#define LOG_CATEGORY LOGC_FS
#include <common.h> #include <common.h>
#include <blk.h> #include <blk.h>
#include <log.h> #include <log.h>
@ -976,17 +979,23 @@ static int pmbr_part_valid(struct partition *part)
/* /*
* is_pmbr_valid(): test Protective MBR for validity * is_pmbr_valid(): test Protective MBR for validity
* *
* @mbr: Pointer to Master Boot-Record data
*
* Returns: 1 if PMBR is valid, 0 otherwise. * Returns: 1 if PMBR is valid, 0 otherwise.
* Validity depends on two things: * Validity depends on two things:
* 1) MSDOS signature is in the last two bytes of the MBR * 1) MSDOS signature is in the last two bytes of the MBR
* 2) One partition of type 0xEE is found, checked by pmbr_part_valid() * 2) One partition of type 0xEE is found, checked by pmbr_part_valid()
*/ */
static int is_pmbr_valid(legacy_mbr * mbr) static int is_pmbr_valid(legacy_mbr *mbr)
{ {
uint sig = le16_to_cpu(mbr->signature);
int i = 0; int i = 0;
if (!mbr || le16_to_cpu(mbr->signature) != MSDOS_MBR_SIGNATURE) if (sig != MSDOS_MBR_SIGNATURE) {
log_debug("Invalid signature %x\n", sig);
return 0; return 0;
}
log_debug("Signature %x valid\n", sig);
for (i = 0; i < 4; i++) { for (i = 0; i < 4; i++) {
if (pmbr_part_valid(&mbr->partition_record[i])) { if (pmbr_part_valid(&mbr->partition_record[i])) {