On 3/13/2018 1:16 PM, Liang, Kan wrote:
On 3/13/2018 11:58 AM, Andy Shevchenko wrote:
On Tue, Mar 13, 2018 at 3:42 AM, Liang, Kan
+#define SKX_CAPID6 0x9c
+#define SKX_CHA_BIT_WIDTH 28
static int skx_count_chabox(void)
+ struct pci_dev *dev = NULL;
+ u32 val = 0;
+ dev = pci_get_device(PCI_VENDOR_ID_INTEL, 0x2083, dev);
+ if (!dev)
+ return 0;
Where is pci_dev_put()?
+ pci_read_config_dword(dev, SKX_CAPID6, &val);
+ return bitmap_weight((unsigned long *)&val, SKX_CHA_BIT_WIDTH);
UB is here.
Fix is simple, use unsigned long and drop this ugly casting.
Just noticed that we have to do casting anyway.
pci_read_config_dword uses u32.
bitmap_weight uses unsigned long.