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| author | John Allen <john.allen@amd.com> | 2020-03-03 14:57:24 +0100 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2020-03-12 13:00:12 +0100 |
| commit | 15f7a4c65293d188651e21a9c5ab6bd8f99a1459 (patch) | |
| tree | e9f48df3c9c8886f9b7dd1e43553db7b3adaa35a /drivers/crypto | |
| parent | crypto: ccp - Cleanup misc_dev on sev_exit() (diff) | |
| download | linux-15f7a4c65293d188651e21a9c5ab6bd8f99a1459.tar.xz linux-15f7a4c65293d188651e21a9c5ab6bd8f99a1459.zip | |
crypto: ccp - Cleanup sp_dev_master in psp_dev_destroy()
Introduce clear_psp_master_device() to ensure that sp_dev_master gets
properly cleared on the release of a psp device.
Fixes: 2a6170dfe755 ("crypto: ccp: Add Platform Security Processor (PSP) device support")
Signed-off-by: John Allen <john.allen@amd.com>
Acked-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto')
| -rw-r--r-- | drivers/crypto/ccp/psp-dev.c | 3 | ||||
| -rw-r--r-- | drivers/crypto/ccp/sp-dev.h | 1 | ||||
| -rw-r--r-- | drivers/crypto/ccp/sp-pci.c | 9 |
3 files changed, 13 insertions, 0 deletions
diff --git a/drivers/crypto/ccp/psp-dev.c b/drivers/crypto/ccp/psp-dev.c index e95e7aa5dbf1..ae7b44599914 100644 --- a/drivers/crypto/ccp/psp-dev.c +++ b/drivers/crypto/ccp/psp-dev.c @@ -215,6 +215,9 @@ void psp_dev_destroy(struct sp_device *sp) tee_dev_destroy(psp); sp_free_psp_irq(sp, psp); + + if (sp->clear_psp_master_device) + sp->clear_psp_master_device(sp); } void psp_set_sev_irq_handler(struct psp_device *psp, psp_irq_handler_t handler, diff --git a/drivers/crypto/ccp/sp-dev.h b/drivers/crypto/ccp/sp-dev.h index 423594608ad1..f913f1494af9 100644 --- a/drivers/crypto/ccp/sp-dev.h +++ b/drivers/crypto/ccp/sp-dev.h @@ -90,6 +90,7 @@ struct sp_device { /* get and set master device */ struct sp_device*(*get_psp_master_device)(void); void (*set_psp_master_device)(struct sp_device *); + void (*clear_psp_master_device)(struct sp_device *); bool irq_registered; bool use_tasklet; diff --git a/drivers/crypto/ccp/sp-pci.c b/drivers/crypto/ccp/sp-pci.c index 56c1f61c0f84..cb6cb47053f4 100644 --- a/drivers/crypto/ccp/sp-pci.c +++ b/drivers/crypto/ccp/sp-pci.c @@ -146,6 +146,14 @@ static struct sp_device *psp_get_master(void) return sp_dev_master; } +static void psp_clear_master(struct sp_device *sp) +{ + if (sp == sp_dev_master) { + sp_dev_master = NULL; + dev_dbg(sp->dev, "Cleared sp_dev_master\n"); + } +} + static int sp_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) { struct sp_device *sp; @@ -206,6 +214,7 @@ static int sp_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) pci_set_master(pdev); sp->set_psp_master_device = psp_set_master; sp->get_psp_master_device = psp_get_master; + sp->clear_psp_master_device = psp_clear_master; ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(48)); if (ret) { |