nvidia-tegra-modules.git/drivers/platform/tegra/mc/fixed_point.c, branch rtss22-ae NVIDIA's kernel modules to support tegra chips (used in Jetson boards) t19x: la/ptsa: fix fixed point arithmetic function 2018-09-26T02:54:50+00:00 Sanjay Chandrashekara sanjayc@nvidia.com 2018-09-25T17:49:31+00:00 4ff10429bcb930e4c12377aa008ed6e306630512 This patch fixes the kernel warning detected by UBSAN. ================================================================================ UBSAN: Undefined behaviour in kernel/nvidia/drivers/platform/tegra/mc/fixed_point.c:127:21 shift exponent 63 is too large for 32-bit type 'unsigned int' CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.9.128-tegra-gb180249 #8 Hardware name: galen (DT) Call trace: [<ffffff8008092e38>] dump_backtrace+0x0/0x2f0 [<ffffff8008093704>] show_stack+0x24/0x30 [<ffffff80088a454c>] dump_stack+0xbc/0x108 [<ffffff8008915224>] ubsan_epilogue+0x14/0x50 [<ffffff80089157c0>] __ubsan_handle_shift_out_of_bounds+0x108/0x158 [<ffffff80094d381c>] fixed_point_shift_right+0x2ac/0x3a0 [<ffffff80094d50e4>] fixed_point_div+0x71c/0x900 [<ffffff80094bb0ec>] setup_freq_ranges+0x17c/0x298 [<ffffff80094d2c74>] tegra_la_get_t19x_specific+0x1fc/0x738 [<ffffff800a201e58>] tegra_latency_allowance_init+0x88/0x4c8 [<ffffff8008083b34>] do_one_initcall+0xd4/0x260 [<ffffff800a191570>] kernel_init_freeable+0x44c/0x4f4 [<ffffff8009b03528>] kernel_init+0x18/0x128 [<ffffff80080837d0>] ret_from_fork+0x10/0x40 ================================================================================ Bug 2393714 Change-Id: Ia7475f5b179547b80fbd7f6fbf3779b0b27a738f Signed-off-by: Sanjay Chandrashekara <sanjayc@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/1845710 Reviewed-by: Kanit Therdsteerasukdi <kanitt@nvidia.com> GVS: Gerrit_Virtual_Submit Reviewed-by: Bo Yan <byan@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com> 
This patch fixes the kernel warning detected by UBSAN.
================================================================================
UBSAN: Undefined behaviour in kernel/nvidia/drivers/platform/tegra/mc/fixed_point.c:127:21
shift exponent 63 is too large for 32-bit type 'unsigned int'
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.9.128-tegra-gb180249 #8
Hardware name: galen (DT)
Call trace:
[<ffffff8008092e38>] dump_backtrace+0x0/0x2f0
[<ffffff8008093704>] show_stack+0x24/0x30
[<ffffff80088a454c>] dump_stack+0xbc/0x108
[<ffffff8008915224>] ubsan_epilogue+0x14/0x50
[<ffffff80089157c0>] __ubsan_handle_shift_out_of_bounds+0x108/0x158
[<ffffff80094d381c>] fixed_point_shift_right+0x2ac/0x3a0
[<ffffff80094d50e4>] fixed_point_div+0x71c/0x900
[<ffffff80094bb0ec>] setup_freq_ranges+0x17c/0x298
[<ffffff80094d2c74>] tegra_la_get_t19x_specific+0x1fc/0x738
[<ffffff800a201e58>] tegra_latency_allowance_init+0x88/0x4c8
[<ffffff8008083b34>] do_one_initcall+0xd4/0x260
[<ffffff800a191570>] kernel_init_freeable+0x44c/0x4f4
[<ffffff8009b03528>] kernel_init+0x18/0x128
[<ffffff80080837d0>] ret_from_fork+0x10/0x40
================================================================================

Bug 2393714

Change-Id: Ia7475f5b179547b80fbd7f6fbf3779b0b27a738f
Signed-off-by: Sanjay Chandrashekara <sanjayc@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1845710
Reviewed-by: Kanit Therdsteerasukdi <kanitt@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Bo Yan <byan@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
platform: t194: la/ptsa: improve error handling 2018-04-27T00:56:05+00:00 Chetan Kumar chetankumarn@nvidia.com 2018-02-02T01:14:11+00:00 655581daa3490667514f81d3d1099193818376c9 Limit the use of BUG_ON in la/ptsa driver. In case of a recoverable error, print a warning message and leave it up to the calling API to handle the error condition by returning appropriate error code. Bug 1755290 JIRA: TMM-29 Change-Id: I111a37903851b0779262c647071a0a26c745eabb Signed-off-by: Chetan Kumar <chetankumarn@nvidia.com> Signed-off-by: Sanjay Chandrashekara <sanjayc@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/1652211 Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com> 
Limit the use of BUG_ON in la/ptsa driver. In case of a recoverable
error, print a warning message and leave it up to the calling API
to handle the error condition by returning appropriate error code.

Bug 1755290

JIRA: TMM-29

Change-Id: I111a37903851b0779262c647071a0a26c745eabb
Signed-off-by: Chetan Kumar <chetankumarn@nvidia.com>
Signed-off-by: Sanjay Chandrashekara <sanjayc@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1652211
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
platform: t194: mc: la/ptsa support for t19x 2018-01-26T21:09:23+00:00 Chetan Kumar chetankumarn@nvidia.com 2018-01-15T18:56:17+00:00 1cf6021752ae253d717ec15f05430719502b8293 This patch adds the following: - LA/PTSA driver for t19x. - Generic debugfs interface for la/ptsa. Bug 1755290 JIRA: TMM-29 Change-Id: I3680590d032c899d0c5fa34d88647fdc0cf0dd8d Signed-off-by: Chetan Kumar <chetankumarn@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/1602736 Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com> 
This patch adds the following:
- LA/PTSA driver for t19x.
- Generic debugfs interface for la/ptsa.

Bug 1755290

JIRA: TMM-29

Change-Id: I3680590d032c899d0c5fa34d88647fdc0cf0dd8d
Signed-off-by: Chetan Kumar <chetankumarn@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1602736
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>