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From 52ba1903b2c8ce69e8cd1de2a78c2c63cc60383b Mon Sep 17 00:00:00 2001
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From: Thomas Huth <thuth@redhat.com>
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Date: Tue, 18 May 2021 13:51:25 -0400
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Subject: [PATCH 5/5] pc-bios/s390-ccw: don't try to read the next block if end
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of chunk is reached
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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RH-Author: Thomas Huth <thuth@redhat.com>
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Message-id: <20210518135125.191329-4-thuth@redhat.com>
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Patchwork-id: 101550
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O-Subject: [RHEL-8.5.0 qemu-kvm PATCH 3/3] pc-bios/s390-ccw: don't try to read the next block if end of chunk is reached
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Bugzilla: 1942880
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RH-Acked-by: Philippe Mathieu-Daudé <philmd@redhat.com>
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RH-Acked-by: David Hildenbrand <david@redhat.com>
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RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
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Don't read the block if a null block number is reached, because this means that
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the end of chunk is reached.
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Reviewed-by: Collin Walling <walling@linux.ibm.com>
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Signed-off-by: Marc Hartmayer <mhartmay@linux.ibm.com>
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Message-Id: <20210416074736.17409-1-mhartmay@linux.ibm.com>
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Signed-off-by: Thomas Huth <thuth@redhat.com>
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(cherry picked from commit a6625d38cce3901a7c1cba069f0abcf743a293f1)
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Signed-off-by: Thomas Huth <thuth@redhat.com>
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Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
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---
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pc-bios/s390-ccw/bootmap.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/pc-bios/s390-ccw/bootmap.c b/pc-bios/s390-ccw/bootmap.c
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index 624f524331..8458b15cb6 100644
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--- a/pc-bios/s390-ccw/bootmap.c
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+++ b/pc-bios/s390-ccw/bootmap.c
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@@ -212,7 +212,7 @@ static int eckd_get_boot_menu_index(block_number_t s1b_block_nr)
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next_block_nr = eckd_block_num(&s1b->seek[i + 1].chs);
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}
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- if (next_block_nr) {
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+ if (next_block_nr && !is_null_block_number(next_block_nr)) {
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read_block(next_block_nr, s2_next_blk,
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"Cannot read stage2 boot loader");
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}
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--
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2.27.0
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