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s390: use the correct count for __iowrite64_copy()

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[ Upstream commit 723a2cc8d69d4342b47dfddbfe6c19f1b135f09b ]

The signature for __iowrite64_copy() requires the number of 64 bit
quantities, not bytes. Multiple by 8 to get to a byte length before
invoking zpci_memcpy_toio()

Fixes: 87bc359b98 ("s390/pci: speed up __iowrite64_copy by using pci store block insn")
Acked-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/0-v1-9223d11a7662+1d7785-s390_iowrite64_jgg@nvidia.com
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jason Gunthorpe
2024-02-16 20:48:14 -04:00
committed by Greg Kroah-Hartman
parent a2b855119e
commit 2b505745a9
1 changed files with 1 additions and 1 deletions
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arch/s390/pci/pci.c
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@@ -273,7 +273,7 @@ resource_size_t pcibios_align_resource(void *data, const struct resource *res,
/* combine single writes by using store-block insn */ /* combine single writes by using store-block insn */
void __iowrite64_copy(void __iomem *to, const void *from, size_t count) void __iowrite64_copy(void __iomem *to, const void *from, size_t count)
{ {
zpci_memcpy_toio(to, from, count); zpci_memcpy_toio(to, from, count * 8);
} }
/* Create a virtual mapping cookie for a PCI BAR */ /* Create a virtual mapping cookie for a PCI BAR */