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From bd1d37e3536136130df41ac8162ce5bb4f361f87 Mon Sep 17 00:00:00 2001
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From: Thomas Huth <thuth@redhat.com>
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Date: Tue, 1 Jun 2021 08:52:10 -0400
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Subject: [PATCH 02/21] pc-bios/s390-ccw: don't try to read the next block if
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end 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: Miroslav Rezanina <mrezanin@redhat.com>
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RH-MergeRequest: 8: Synchronize with RHEL-AV 8.5 release 19 to RHEL 9
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RH-Commit: [1/8] 69a43520a9e7f0ab92bdfdc47281c7606f5159e7 (mrezanin/centos-src-qemu-kvm)
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RH-Bugzilla: 1957194
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RH-Acked-by: Daniel P. Berrangé <berrange@redhat.com>
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RH-Acked-by: Greg Kurz <gkurz@redhat.com>
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RH-Acked-by: Laurent Vivier <lvivier@redhat.com>
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RH-Acked-by: Vitaly Kuznetsov <vkuznets@redhat.com>
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From: Marc Hartmayer <mhartmay@linux.ibm.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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Signed-off-by: Miroslav Rezanina <mrezanin@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 44df7d16af..b46997c0b7 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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@@ -213,7 +213,7 @@ 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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