linux.git/drivers/net/wireless/rsi, branch v4.20.16

rsi: Remove unnecessary boolean condition

2018-10-01T15:31:10+00:00

Clang warns that the address of a pointer will always evaluated as true
in a boolean context.

drivers/net/wireless/rsi/rsi_91x_mac80211.c:927:50: warning: address of
array 'key->key' will always evaluate to 'true'
[-Wpointer-bool-conversion]
        if (vif->type == NL80211_IFTYPE_STATION && key->key &&
                                                ~~ ~~~~~^~~
1 warning generated.

Link: https://github.com/ClangBuiltLinux/linux/issues/136
Signed-off-by: Nathan Chancellor 
Signed-off-by: Kalle Valo

rsi: remove set but not used variables 'header_size' and 'tx_params'

2018-09-04T08:17:05+00:00

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/net/wireless/rsi/rsi_91x_hal.c: In function 'rsi_send_data_pkt':
drivers/net/wireless/rsi/rsi_91x_hal.c:288:5: warning:
 variable 'header_size' set but not used [-Wunused-but-set-variable]

'tx_params' only used for 'header_size' dereferenced,so also
can be removed.

Signed-off-by: YueHaibing 
Signed-off-by: Kalle Valo

rsi: improve kernel thread handling to fix kernel panic

2018-08-31T15:49:48+00:00

While running regressions, observed below kernel panic when sdio disconnect
called. This is because of, kthread_stop() is taking care of
wait_for_completion() by default. When wait_for_completion triggered
in kthread_stop and as it was done already, giving kernel panic.
Hence, removing redundant wait_for_completion() from rsi_kill_thread().

... skipping ...
BUG: unable to handle kernel NULL pointer dereference at           (null)
IP: [] exit_creds+0x1f/0x50
PGD 0
Oops: 0002 [#1] SMP
CPU: 0 PID: 6502 Comm: rmmod Tainted: G  OE   4.15.9-Generic #154-Ubuntu
Hardware name: Dell Inc. Edge Gateway 3003/ , BIOS 01.00.00 04/17/2017
Stack:
ffff88007392e600 ffff880075847dc0 ffffffff8108160a 0000000000000000
ffff88007392e600 ffff880075847de8 ffffffff810a484b ffff880076127000
ffff88003cd3a800 ffff880074f12a00 ffff880075847e28 ffffffffc09bed15
Call Trace:
[] __put_task_struct+0x5a/0x140
[] kthread_stop+0x10b/0x110
[] rsi_disconnect+0x2f5/0x300 [ven_rsi_sdio]
[] ? __pm_runtime_resume+0x5b/0x80
[] sdio_bus_remove+0x38/0x100
[] __device_release_driver+0xa4/0x150
[] driver_detach+0xb5/0xc0
[] bus_remove_driver+0x55/0xd0
[] driver_unregister+0x2c/0x50
[] sdio_unregister_driver+0x1a/0x20
[] rsi_module_exit+0x15/0x30 [ven_rsi_sdio]
[] SyS_delete_module+0x1b8/0x210
[] entry_SYSCALL_64_fastpath+0x1c/0xbb

Signed-off-by: Siva Rebbagondla 
Signed-off-by: Kalle Valo

rsi: fix memory alignment issue in ARM32 platforms

2018-08-31T15:49:47+00:00

During testing in ARM32 platforms, observed below kernel panic, as driver
accessing data beyond the allocated memory while submitting URB to USB.

Fix: Resolved this by specifying correct length by considering 64 bit
alignment. so that, USB bus driver will access only allocated memory.

Unit-test: Tested and confirm that driver bring up and scanning,
connection and data transfer works fine with this fix.

...skipping...
[   25.389450] Unable to handle kernel paging request at virtual
	       address 5aa11422
[   25.403078] Internal error: Oops: 5 [#1] SMP ARM
[   25.407703] Modules linked in: rsi_usb
[   25.411473] CPU: 1 PID: 317 Comm: RX-Thread Not tainted 4.18.0-rc7 #1
[   25.419221] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
[   25.425764] PC is at skb_release_data+0x90/0x168
[   25.430393] LR is at skb_release_all+0x28/0x2c
[   25.434842] pc : [<807435b0>] lr : [<80742ba0>] psr: 200e0013 5aa1141e
[   25.464633] Flags: nzCv  IRQs on  FIQs on  Mode SVC_32 ISA ARM Segment none
[   25.477524] Process RX-Thread (pid: 317, stack limit = 0x(ptrval))
[   25.483709] Stack: (0xedf69ed8 to 0xedf6a000)
[   25.569907] Backtrace:
[   25.572368] [<80743520>] (skb_release_data) from [<80742ba0>]
	       (skb_release_all+0x28/0x2c)
[   25.580555] r9:7f00258c r8:00000001 r7:ee355000 r6:eddab0d0
	       r5:eddab000 r4:eddbb840
[   25.588308] [<80742b78>] (skb_release_all) from [<807432cc>]
	       (consume_skb+0x30/0x50)
[   25.596055] r5:eddab000 r4:eddbb840
[   25.599648] [<8074329c>] (consume_skb) from [<7f00117c>]
	       (rsi_usb_rx_thread+0x64/0x12c [rsi_usb])
[   25.608524] r5:eddab000 r4:eddbb840
[   25.612116] [<7f001118>] (rsi_usb_rx_thread [rsi_usb]) from
	       [<80142750>] (kthread+0x11c/0x15c)
[   25.620735] r10:ee9ff9e0 r9:edcde3b8 r8:ee355000 r7:edf68000
	       r6:edd3a780 r5:00000000
[   25.628567] r4:edcde380
[   25.631110] [<80142634>] (kthread) from [<801010e8>]
	       (ret_from_fork+0x14/0x2c)
[   25.638336] Exception stack(0xedf69fb0 to 0xedf69ff8)
[   25.682929] ---[ end trace 8236a5496f5b5d3b ]---

Signed-off-by: Siva Rebbagondla 
Signed-off-by: Kalle Valo

rsi: remove redundant variables bss, wh and temp_flash_content

2018-08-09T15:13:46+00:00

Variables bss, wh and temp_flash_content are being assigned but are
never used hence they are redundant and can be removed.

Cleans up clang warnings:
warning: variable 'bss' set but not used [-Wunused-but-set-variable]
warning: variable 'wh' set but not used [-Wunused-but-set-variable]
warning: variable 'temp_flash_content' set but not used
 [-Wunused-but-set-variable]

Signed-off-by: Colin Ian King 
Signed-off-by: Kalle Valo

rsi: move init_done flag to end of rsi_91x_init().

2018-07-31T07:16:05+00:00

common->init_done flag should set after basic initialization. Hence,
moving init_done flag at end of rsi_91x_init().

Signed-off-by: Amol Hanwate 
Signed-off-by: Siva Rebbagondla 
Signed-off-by: Kalle Valo

rsi: fill rx_params only once.

2018-07-31T07:16:01+00:00

rx_params are getting updated two times in driver, which is not required.
Hence, removing duplicate updation of rx_params from rsi_prepare_skb().

Signed-off-by: Amol Hanwate 
Signed-off-by: Siva Rebbagondla 
Signed-off-by: Kalle Valo

rsi: Correct RSI_NEEDED_HEADROOM in mac80211_attach.

2018-07-31T07:16:00+00:00

Currently, RSI_NEEDED_HEADROOM is '80' for rsi driver, which is wrong.
As per rsi internal frame format, the RSI_NEEDED_HEADROOM shall be '84',
which is 64(dword_align) + 4(extended_desc) + 16(frame_desc).
Hence, corrected the needed headroom.

Signed-off-by: Amol Hanwate 
Signed-off-by: Siva Rebbagondla 
Signed-off-by: Kalle Valo

rsi: add firmware support for AP+BT dual mode

2018-07-31T07:15:56+00:00

Currently, AP mode will work on only WLAN alone firmware. To give support
for AP and BT dual mode, adding firmware entry in 'struct ta_metadata'.
The firmware entry is based on what coex_mode is used in driver and coex
mode '4' for all AP+BT related functionalities. Hence, added the same.

Signed-off-by: Siva Rebbagondla 
Signed-off-by: Kalle Valo

rsi: remove redundant flash_content variable

2018-07-31T07:15:54+00:00

while cleaning up the driver, observed that flash_content pointer is not
necessary in rsi_load_firmware(). Instead of this, driver can use
'fw_entry->data' directly.Hence, removed redundant flash_content pointer.

Signed-off-by: Siva Rebbagondla 
Signed-off-by: Kalle Valo