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path: root/drivers/usb/cdns3/cdnsp-mem.c
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2020-12-29usb: cdnsp: Fixes for sparse warningsPawel Laszczak1-5/+6
Patch fixes all sparse warnings in cdsnp driver. It fixes the following warnings: cdnsp-ring.c:1441: warning: incorrect type in assignment cdnsp-ring.c:1444: warning: restricted __le32 degrades to integer cdnsp-ring.c:2200: warning: dubious: x | !y cdnsp-gadget.c:501: warning: incorrect type in assignment cdnsp-gadget.c:504: warning: restricted __le32 degrades to integer cdnsp-gadget.c:507: warning: restricted __le32 degrades to integer cdnsp-gadget.c:508: warning: restricted __le32 degrades to integer cdnsp-gadget.c:509: warning: invalid assignment: |= cdnsp-gadget.c:510: warning: cast from restricted __le32 cdnsp-gadget.c:558: warning: incorrect type in assignment cdnsp-gadget.c:561: warning: restricted __le32 degrades to integer cdnsp-gadget.c:570: warning: restricted __le32 degrades to integer cdnsp-gadget.c:1571: warning: incorrect type in argument 1 cdnsp-gadget.c:1602: warning: restricted __le32 degrades to integer cdnsp-gadget.c:1760: warning: incorrect type in assignment cdnsp-gadget.c:1762: warning: incorrect type in assignment cdnsp-gadget.c:1763: warning: incorrect type in assignment cdnsp-gadget.c:1764: warning: incorrect type in assignment cdnsp-gadget.c:1765: warning: incorrect type in assignment cdnsp-gadget.c:1766: warning: incorrect type in assignment cdnsp-gadget.c:1767: warning: incorrect type in assignment cdnsp-gadget.c:458: warning: cast truncates bits from constant value (ffffffff07ffffff becomes 7ffffff) cdnsp-gadget.c:666: warning: cast truncates bits from constant value (ffffffff07ffffff becomes 7ffffff) cdnsp-mem.c:762: warning: incorrect type in assignment cdnsp-mem.c:763: warning: incorrect type in assignment cdnsp-mem.c:928: warning: cast from restricted __le16 cdnsp-mem.c:1187: warning: incorrect type in assignment cdnsp-mem.c:1191: warning: incorrect type in assignment cdnsp-ep0.c:142: warning: incorrect type in assignment cdnsp-ep0.c:144: warning: restricted __le32 degrades to integer cdnsp-ep0.c:147: warning: restricted __le32 degrades to integer cdnsp-ep0.c:148: warning: restricted __le32 degrades to integer cdnsp-ep0.c:179: warning: incorrect type in argument 1 cdnsp-ep0.c:311: warning: incorrect type in argument 1 cdnsp-ep0.c:469: warning: incorrect type in assignment cdnsp-trace.h:611:1: warning: cast from restricted __le32 Reported-by: kernel test robot <[email protected]> Signed-off-by: Pawel Laszczak <[email protected]> Signed-off-by: Peter Chen <[email protected]>
2020-12-29usb: cdnsp: fix error handling in cdnsp_mem_init()Pawel Laszczak1-12/+24
This function uses "One Function Cleans up Everything" style and that's basically impossible to do correctly. It's cleaner to write it with "clean up the most recent allocation". Patch fixes two isues: 1. If pdev->dcbaa = dma_alloc_coherent() fails then that leads to a NULL dereference inside the cdnsp_free_priv_device() function. 2. if cdnsp_alloc_priv_device() fails that leads to a double free because we free pdev->out_ctx.bytes in several places. Signed-off-by: Dan Carpenter <[email protected]> Signed-off-by: Pawel Laszczak <[email protected]> Reported-by: Dan Carpenter <[email protected]> Tested-by: Pawel Laszczak <[email protected]> Signed-off-by: Peter Chen <[email protected]>
2020-12-29usb: cdnsp: Removes some not useful function argumentsPawel Laszczak1-12/+11
This patch removes 'flags' argument from some functions and use indirect the correct GFP_XXX flag to fix the following warning: 'The patch d40a169aab24: "usb: cdnsp: cdns3 Add main part of Cadence USBSSP DRD Driver" from Dec 7, 2020, leads to the following static checker warning: drivers/usb/cdns3/cdnsp-mem.c:1229 cdnsp_mem_init() warn: use 'flags' here instead of GFP_XXX? drivers/usb/cdns3/cdnsp-mem.c 1206 int cdnsp_mem_init(struct cdnsp_device *pdev, gfp_t flags);' ^^^^^^^^^^^ Signed-off-by: Pawel Laszczak <[email protected]> Reported-by: Dan Carpenter <[email protected]> Signed-off-by: Peter Chen <[email protected]>
2020-12-29usb: cdnsp: Add tracepoints for CDNSP driverPawel Laszczak1-2/+16
Patch adds the series of tracepoints that can be used for debugging issues detected in driver. Signed-off-by: Pawel Laszczak <[email protected]> Reviewed-by: Peter Chen <[email protected]> Signed-off-by: Peter Chen <[email protected]>
2020-12-29usb: cdnsp: cdns3 Add main part of Cadence USBSSP DRD DriverPawel Laszczak1-0/+1310
This patch introduces the main part of Cadence USBSSP DRD driver to Linux kernel. To reduce the patch size a little bit, the header file gadget.h was intentionally added as separate patch. The Cadence USBSSP DRD Controller is a highly configurable IP Core which can be instantiated as Dual-Role Device (DRD), Peripheral Only and Host Only (XHCI)configurations. The current driver has been validated with FPGA platform. We have support for PCIe bus, which is used on FPGA prototyping. The host side of USBSS DRD controller is compliant with XHCI. The architecture for device side is almost the same as for host side, and most of the XHCI specification can be used to understand how this controller operates. Signed-off-by: Pawel Laszczak <[email protected]> Signed-off-by: Peter Chen <[email protected]>