diff options
| author | Andreas Puhm <puhm@oregano.at> | 2018-11-07 11:51:47 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-02-12 19:45:58 +0100 |
| commit | 21c53f73ea03b20cebc9a4d23a39abf05e58dfd9 (patch) | |
| tree | bdd93ca71e2b97d27636b12d23dc6813e966b5e0 /drivers/fpga | |
| parent | cea8d9e424bd42ee7305c1b41d7f6b2846e472fb (diff) | |
fpga: altera-cvp: Fix registration for CvP incapable devices
[ Upstream commit 68f60538daa4bc3da5d0764d46f391916fba20fd ]
The probe function needs to verify the CvP enable bit in order to
properly determine if FPGA Manager functionality can be safely
enabled.
Fixes: 34d1dc17ce97 ("fpga manager: Add Altera CvP driver")
Signed-off-by: Andreas Puhm <puhm@oregano.at>
Signed-off-by: Anatolij Gustschin <agust@denx.de>
Reviewed-by: Moritz Fischer <mdf@kernel.org>
Acked-by: Alan Tull <atull@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/fpga')
| -rw-r--r-- | drivers/fpga/altera-cvp.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/fpga/altera-cvp.c b/drivers/fpga/altera-cvp.c index 00e73d28077c..b7558acd1a66 100644 --- a/drivers/fpga/altera-cvp.c +++ b/drivers/fpga/altera-cvp.c @@ -404,6 +404,7 @@ static int altera_cvp_probe(struct pci_dev *pdev, { struct altera_cvp_conf *conf; u16 cmd, val; + u32 regval; int ret; /* @@ -417,6 +418,14 @@ static int altera_cvp_probe(struct pci_dev *pdev, return -ENODEV; } + pci_read_config_dword(pdev, VSE_CVP_STATUS, ®val); + if (!(regval & VSE_CVP_STATUS_CVP_EN)) { + dev_err(&pdev->dev, + "CVP is disabled for this device: CVP_STATUS Reg 0x%x\n", + regval); + return -ENODEV; + } + conf = devm_kzalloc(&pdev->dev, sizeof(*conf), GFP_KERNEL); if (!conf) return -ENOMEM; |