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pc-bios/s390-ccw: don't try to read the next block if end of chunk is reached

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Don't read the block if a null block number is reached, because this means that
the end of chunk is reached.

Reviewed-by: Collin Walling <walling@linux.ibm.com>
Signed-off-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Message-Id: <20210416074736.17409-1-mhartmay@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Marc Hartmayer 2021-04-16 09:47:36 +02:00 committed by Thomas Huth
parent d90f154867
commit a6625d38cc
1 changed files with 1 additions and 1 deletions
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pc-bios/s390-ccw/bootmap.c
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@ -213,7 +213,7 @@ static int eckd_get_boot_menu_index(block_number_t s1b_block_nr)
next_block_nr = eckd_block_num(&s1b->seek[i + 1].chs); next_block_nr = eckd_block_num(&s1b->seek[i + 1].chs);
} }
if (next_block_nr) { if (next_block_nr && !is_null_block_number(next_block_nr)) {
read_block(next_block_nr, s2_next_blk, read_block(next_block_nr, s2_next_blk,
"Cannot read stage2 boot loader"); "Cannot read stage2 boot loader");
} }