| Message ID | 1509450978-17784-3-git-send-email-gilad@benyossef.com |
|---|---|
| State | New |
| Headers | show |
| Series | [1/3] staging: ccree: copy IV to DMAable memory | expand |
Hi, Thank you for the review. On Wed, Nov 1, 2017 at 1:09 PM, Dan Carpenter <dan.carpenter@oracle.com> wrote: > On Tue, Oct 31, 2017 at 11:56:16AM +0000, Gilad Ben-Yossef wrote: >> >> - if (!dev->coherent_dma_mask) >> - dev->coherent_dma_mask = DMA_BIT_MASK(DMA_BIT_MASK_LEN); >> + if (rc) { >> + dev_err(dev, "Error: failed in dma_set_mask, mask=%par\n", >> + &dma_mask); >> + goto post_drvdata_err; > > > Also this is not the right goto. We should be turning the clk off. Yes, it's wrong. I think a better thing to do though is to check the DMA mask before turning the clock on, so the goto label is right, but the code location is wrong... > > I don't really care for the naming scheme, and I know you renamed it for > me already once and I feel bad for not liking it more. It's still > really a come-from label name and doesn't say what the goto does... > Instead of post_clk_err, I wish it had names like "err_clk_off:". > > And in this case what it does is print a duplicative error message and > return. :/ The goto post_drvdata_err: lines should just print their > own error messages if needed and return directly. If there is no > cleanup then there is no need for a goto. > Both good points. I will address them in a later patch. > Anyway, that's not related to this patch. Just resend it with > goto post_clk_err: in the v2. Will do. Thanks! Gilad -- Gilad Ben-Yossef Chief Coffee Drinker "If you take a class in large-scale robotics, can you end up in a situation where the homework eats your dog?" -- Jean-Baptiste Queru
diff --git a/drivers/staging/ccree/ssi_driver.c b/drivers/staging/ccree/ssi_driver.c index 5f03c25..6d4269f 100644 --- a/drivers/staging/ccree/ssi_driver.c +++ b/drivers/staging/ccree/ssi_driver.c @@ -208,6 +208,7 @@ static int init_cc_resources(struct platform_device *plat_dev) struct device *dev = &plat_dev->dev; struct device_node *np = dev->of_node; u32 signature_val; + dma_addr_t dma_mask; int rc = 0; new_drvdata = devm_kzalloc(dev, sizeof(*new_drvdata), GFP_KERNEL); @@ -260,11 +261,24 @@ static int init_cc_resources(struct platform_device *plat_dev) if (rc) goto post_drvdata_err; - if (!dev->dma_mask) - dev->dma_mask = &dev->coherent_dma_mask; + if (!plat_dev->dev.dma_mask) + plat_dev->dev.dma_mask = &plat_dev->dev.coherent_dma_mask; + + dma_mask = (dma_addr_t)(DMA_BIT_MASK(DMA_BIT_MASK_LEN)); + while (dma_mask > 0x7fffffffUL) { + if (dma_supported(&plat_dev->dev, dma_mask)) { + rc = dma_set_coherent_mask(&plat_dev->dev, dma_mask); + if (!rc) + break; + } + dma_mask >>= 1; + } - if (!dev->coherent_dma_mask) - dev->coherent_dma_mask = DMA_BIT_MASK(DMA_BIT_MASK_LEN); + if (rc) { + dev_err(dev, "Error: failed in dma_set_mask, mask=%par\n", + &dma_mask); + goto post_drvdata_err; + } /* Verify correct mapping */ signature_val = CC_HAL_READ_REGISTER(CC_REG_OFFSET(HOST_RGF, HOST_SIGNATURE));
Properly handle limiting of DMA masks based on device and bus capabilities. Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com> --- drivers/staging/ccree/ssi_driver.c | 22 ++++++++++++++++++---- 1 file changed, 18 insertions(+), 4 deletions(-) -- 2.7.4