s390: use the correct count for __iowrite64_copy()

jgunthorpe · hcahca · commit 723a2cc8d69d · 2024-02-21T15:07:46.000+01:00
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: 87bc359 ("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>
diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c
@@ -252,7 +252,7 @@ resource_size_t pcibios_align_resource(void *data, const struct resource *res,
 /* combine single writes by using store-block insn */
 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);
 }
 
 void __iomem *ioremap_prot(phys_addr_t phys_addr, size_t size,

Original file line number	Diff line number	Diff line change
`@@ -252,7 +252,7 @@ resource_size_t pcibios_align_resource(void data, const struct resource res,`
`252`	`252`	`/* combine single writes by using store-block insn */`
`253`	`253`	`void __iowrite64_copy(void __iomem to, const void from, size_t count)`
`254`	`254`	`{`
`255`		`- zpci_memcpy_toio(to, from, count);`
	`255`	`+ zpci_memcpy_toio(to, from, count * 8);`
`256`	`256`	`}`
`257`	`257`
`258`	`258`	`void __iomem *ioremap_prot(phys_addr_t phys_addr, size_t size,`