From: Sakari Ailus <sakari.ailus@linux.intel.com>
To: Stephen Rothwell <sfr@canb.auug.org.au>, linux-media@vger.kernel.org
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>,
Bingbu Cao <bingbu.cao@intel.com>,
Hans Verkuil <hverkuil-cisco@xs4all.nl>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Linux Next Mailing List <linux-next@vger.kernel.org>
Subject: [PATCH 1/1] media: intel/ipu6: Don't re-allocate memory for firmware
Date: Thu, 2 May 2024 18:49:50 +0300 [thread overview]
Message-ID: <20240502154950.549015-1-sakari.ailus@linux.intel.com> (raw)
In-Reply-To: <20240501102236.3b2585d1@canb.auug.org.au>
The ipu6 driver allocated vmalloc memory for the firmware if
request_firmware() somehow managed not to use vmalloc to allocate it.
Still how the memory is allocated by request_firmware() is not specified
in its API, so be prepared for kmalloc-allocated firmware, too. Instead of
allocating new vmalloc-backed buffer for the firmware, obtain the pages
from virtual addresses instead.
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Fixes: 25fedc021985 ("media: intel/ipu6: add Intel IPU6 PCI device driver")
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
---
Hello everyone,
Mauro preferred not to merge the earlier patch. Admittedly, there are
better ways to fix the problem. Such as this one.
- Sakari
drivers/media/pci/intel/ipu6/ipu6-buttress.c | 7 +++-
drivers/media/pci/intel/ipu6/ipu6.c | 41 +-------------------
2 files changed, 7 insertions(+), 41 deletions(-)
diff --git a/drivers/media/pci/intel/ipu6/ipu6-buttress.c b/drivers/media/pci/intel/ipu6/ipu6-buttress.c
index dbcf1aa87872..23c537e7ce1e 100644
--- a/drivers/media/pci/intel/ipu6/ipu6-buttress.c
+++ b/drivers/media/pci/intel/ipu6/ipu6-buttress.c
@@ -552,12 +552,16 @@ int ipu6_buttress_reset_authentication(struct ipu6_device *isp)
int ipu6_buttress_map_fw_image(struct ipu6_bus_device *sys,
const struct firmware *fw, struct sg_table *sgt)
{
+ bool is_vmalloc = is_vmalloc_addr(fw->data);
struct page **pages;
const void *addr;
unsigned long n_pages;
unsigned int i;
int ret;
+ if (!is_vmalloc && !virt_addr_valid(fw->data))
+ return -EDOM;
+
n_pages = PHYS_PFN(PAGE_ALIGN(fw->size));
pages = kmalloc_array(n_pages, sizeof(*pages), GFP_KERNEL);
@@ -566,7 +570,8 @@ int ipu6_buttress_map_fw_image(struct ipu6_bus_device *sys,
addr = fw->data;
for (i = 0; i < n_pages; i++) {
- struct page *p = vmalloc_to_page(addr);
+ struct page *p = is_vmalloc ?
+ vmalloc_to_page(addr) : virt_to_page(addr);
if (!p) {
ret = -ENOMEM;
diff --git a/drivers/media/pci/intel/ipu6/ipu6.c b/drivers/media/pci/intel/ipu6/ipu6.c
index 7bcd9c5a381a..2cf04251c9e7 100644
--- a/drivers/media/pci/intel/ipu6/ipu6.c
+++ b/drivers/media/pci/intel/ipu6/ipu6.c
@@ -503,45 +503,6 @@ static void ipu6_configure_vc_mechanism(struct ipu6_device *isp)
writel(val, isp->base + BUTTRESS_REG_BTRS_CTRL);
}
-static int request_cpd_fw(const struct firmware **firmware_p, const char *name,
- struct device *device)
-{
- const struct firmware *fw;
- struct firmware *dst;
- int ret = 0;
-
- ret = request_firmware(&fw, name, device);
- if (ret)
- return ret;
-
- if (is_vmalloc_addr(fw->data)) {
- *firmware_p = fw;
- return 0;
- }
-
- dst = kzalloc(sizeof(*dst), GFP_KERNEL);
- if (!dst) {
- ret = -ENOMEM;
- goto release_firmware;
- }
-
- dst->size = fw->size;
- dst->data = vmalloc(fw->size);
- if (!dst->data) {
- kfree(dst);
- ret = -ENOMEM;
- goto release_firmware;
- }
-
- memcpy((void *)dst->data, fw->data, fw->size);
- *firmware_p = dst;
-
-release_firmware:
- release_firmware(fw);
-
- return ret;
-}
-
static int ipu6_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
struct ipu6_buttress_ctrl *isys_ctrl = NULL, *psys_ctrl = NULL;
@@ -627,7 +588,7 @@ static int ipu6_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
if (ret)
return ret;
- ret = request_cpd_fw(&isp->cpd_fw, isp->cpd_fw_name, dev);
+ ret = request_firmware(&isp->cpd_fw, isp->cpd_fw_name, dev);
if (ret) {
dev_err_probe(&isp->pdev->dev, ret,
"Requesting signed firmware %s failed\n",
--
2.39.2
prev parent reply other threads:[~2024-05-02 15:50 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20240501102236.3b2585d1@canb.auug.org.au>
2024-05-02 6:15 ` [PATCH 1/1] media: ipu6: Fix vmalloc memory allocation Sakari Ailus
2024-05-02 10:03 ` Mauro Carvalho Chehab
2024-05-02 15:49 ` Sakari Ailus [this message]
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