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s390-ccw.img: Reinitialize guessing on reboot

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guessed_disk_nature is a static zero variable. As the QEMU ELF
loader does not zero the BSS section, lets do it explicitely here.

This fixes reboot for some corner cases (like FCP flash
devices with logical_block_size=512, physical_block_size=4096)

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Tested-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Message-Id: <1425310029-53396-3-git-send-email-borntraeger@de.ibm.com>
This commit is contained in:
Christian Borntraeger 2015-03-02 16:27:09 +01:00
parent 2be9d2927c
commit 5c8d542004
1 changed files with 1 additions and 0 deletions
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pc-bios/s390-ccw/virtio.c
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@ -362,6 +362,7 @@ void virtio_setup_block(struct subchannel_id schid)
struct vq_config_block config = {};
blk_cfg.blk_size = 0; /* mark "illegal" - setup started... */
guessed_disk_nature = false;
virtio_reset(schid);