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This is in preparation for switching over to using mutex > guard()'s. > > Signed-off-by: Michael Roth Reviewed-by: Tom Lendacky > --- > drivers/crypto/ccp/sev-dev.c | 27 ++++++++++----------------- > 1 file changed, 10 insertions(+), 17 deletions(-) > > diff --git a/drivers/crypto/ccp/sev-dev.c b/drivers/crypto/ccp/sev-dev.c > index aae0b15a10d9..1e017783dd03 100644 > --- a/drivers/crypto/ccp/sev-dev.c > +++ b/drivers/crypto/ccp/sev-dev.c > @@ -2536,17 +2536,14 @@ static int __sev_do_snp_platform_status(struct sev_user_data_snp_status *status, > int *error) > { > struct sev_device *sev = psp_master->sev_data; > + void *data __free(free_page) = NULL; > struct sev_data_snp_addr buf; > - struct page *status_page; > - void *data; > int ret; > > - status_page = alloc_page(GFP_KERNEL_ACCOUNT); > - if (!status_page) > + data = (void *)get_zeroed_page(GFP_KERNEL_ACCOUNT); > + if (!data) > return -ENOMEM; > > - data = page_address(status_page); > - > /* > * SNP_PLATFORM_STATUS can be executed in any SNP state. But if executed > * when SNP has been initialized, the status page must be firmware-owned. > @@ -2556,10 +2553,8 @@ static int __sev_do_snp_platform_status(struct sev_user_data_snp_status *status, > * Firmware expects the status page to be in Firmware state, > * otherwise it will report an error INVALID_PAGE_STATE. > */ > - if (rmp_mark_pages_firmware(__pa(data), 1, true)) { > - ret = -EFAULT; > - goto cleanup; > - } > + if (rmp_mark_pages_firmware(__pa(data), 1, true)) > + return -EFAULT; > } > > buf.address = __psp_pa(data); > @@ -2571,17 +2566,15 @@ static int __sev_do_snp_platform_status(struct sev_user_data_snp_status *status, > * in Firmware state on failure. Use snp_reclaim_pages() to > * transition either case back to Hypervisor-owned state. > */ > - if (snp_reclaim_pages(__pa(data), 1, true)) > + if (snp_reclaim_pages(__pa(data), 1, true)) { > + data = NULL; > return -EFAULT; > + } > } > > - if (ret) > - goto cleanup; > - > - memcpy(status, data, sizeof(*status)); > + if (!ret) > + memcpy(status, data, sizeof(*status)); > > -cleanup: > - __free_pages(status_page, 0); > return ret; > } >