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PCI: Add PCI_STD_NUM_BARS for the number of standard BARs

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Code that iterates over all standard PCI BARs typically uses
PCI_STD_RESOURCE_END.  However, that requires the unusual test
"i <= PCI_STD_RESOURCE_END" rather than something the typical
"i < PCI_STD_NUM_BARS".

Add a definition for PCI_STD_NUM_BARS and change loops to use the more
idiomatic C style to help avoid fencepost errors.

Link: https://lore.kernel.org/r/20190927234026.23342-1-efremov@linux.com
Link: https://lore.kernel.org/r/20190927234308.23935-1-efremov@linux.com
Link: https://lore.kernel.org/r/20190916204158.6889-3-efremov@linux.com
Signed-off-by: Denis Efremov <efremov@linux.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Sebastian Ott <sebott@linux.ibm.com>			# arch/s390/
Acked-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>	# video/fbdev/
Acked-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>	# pci/controller/dwc/
Acked-by: Jack Wang <jinpu.wang@cloud.ionos.com>		# scsi/pm8001/
Acked-by: Martin K. Petersen <martin.petersen@oracle.com>	# scsi/pm8001/
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>			# memstick/
This commit is contained in:
Denis Efremov
2019-10-14 10:22:26 -05:00
committed by Bjorn Helgaas
parent 7608158df3
commit c9c13ba428
46 changed files with 110 additions and 113 deletions
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include/uapi/linux/pci_regs.h
+1
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@@ -34,6 +34,7 @@
* of which the first 64 bytes are standardized as follows:
*/
#define PCI_STD_HEADER_SIZEOF 64
#define PCI_STD_NUM_BARS 6 /* Number of standard BARs */
#define PCI_VENDOR_ID 0x00 /* 16 bits */
#define PCI_DEVICE_ID 0x02 /* 16 bits */
#define PCI_COMMAND 0x04 /* 16 bits */