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pci: Convert msix_init() to Error and fix callers

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msix_init() reports errors with error_report(), which is wrong when
it's used in realize().  The same issue was fixed for msi_init() in
commit 1108b2f. In order to make the API change as small as possible,
leave the return value check to later patch.

For some devices(like e1000e, vmxnet3, nvme) who won't fail because of
msix_init's failure, suppress the error report by passing NULL error
object.

Bonus: add comment for msix_init.

CC: Jiri Pirko <jiri@resnulli.us>
CC: Gerd Hoffmann <kraxel@redhat.com>
CC: Dmitry Fleytman <dmitry@daynix.com>
CC: Jason Wang <jasowang@redhat.com>
CC: Michael S. Tsirkin <mst@redhat.com>
CC: Hannes Reinecke <hare@suse.de>
CC: Paolo Bonzini <pbonzini@redhat.com>
CC: Alex Williamson <alex.williamson@redhat.com>
CC: Markus Armbruster <armbru@redhat.com>
CC: Marcel Apfelbaum <marcel@redhat.com>
Signed-off-by: Cao jin <caoj.fnst@cn.fujitsu.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Cao jin 2017-01-17 14:18:48 +08:00 • committed by Michael S. Tsirkin
parent 20729dbd01
commit ee640c625e
12 changed files with 58 additions and 24 deletions
Download patch file Download diff file Expand all files Collapse all files

5
include/hw/pci/msix.h
View file

@ -9,9 +9,10 @@ MSIMessage msix_get_message(PCIDevice *dev, unsigned int vector);
int msix_init(PCIDevice *dev, unsigned short nentries,
MemoryRegion *table_bar, uint8_t table_bar_nr,
unsigned table_offset, MemoryRegion *pba_bar,
uint8_t pba_bar_nr, unsigned pba_offset, uint8_t cap_pos);
uint8_t pba_bar_nr, unsigned pba_offset, uint8_t cap_pos,
Error **errp);
int msix_init_exclusive_bar(PCIDevice *dev, unsigned short nentries,
uint8_t bar_nr);
uint8_t bar_nr, Error **errp);
void msix_write_config(PCIDevice *dev, uint32_t address, uint32_t val, int len);