• Xulin Sun's avatar
    rtc: pcf2127: fix a kmemleak caused in pcf2127_i2c_gather_write · 9bde0afb
    Xulin Sun authored
    
    
    pcf2127_i2c_gather_write() allocates memory as local variable
    for i2c_master_send(), after finishing the master transfer,
    the allocated memory should be freed. The kmemleak is reported:
    
    unreferenced object 0xffff80231e7dba80 (size 64):
      comm "hwclock", pid 27762, jiffies 4296880075 (age 356.944s)
      hex dump (first 32 bytes):
        03 00 12 03 19 02 11 13 00 80 98 18 00 00 ff ff ................
        00 50 00 00 00 00 00 00 02 00 00 00 00 00 00 00 .P..............
      backtrace:
        [<ffff000008221398>] create_object+0xf8/0x278
        [<ffff000008a96264>] kmemleak_alloc+0x74/0xa0
        [<ffff00000821070c>] __kmalloc+0x1ac/0x348
        [<ffff0000087ed1dc>] pcf2127_i2c_gather_write+0x54/0xf8
        [<ffff0000085fd9d4>] _regmap_raw_write+0x464/0x850
        [<ffff0000085fe3f4>] regmap_bulk_write+0x1a4/0x348
        [<ffff0000087ed32c>] pcf2127_rtc_set_time+0xac/0xe8
        [<ffff0000087eaad8>] rtc_set_time+0x80/0x138
        [<ffff0000087ebfb0>] rtc_dev_ioctl+0x398/0x610
        [<ffff00000823f2c0>] do_vfs_ioctl+0xb0/0x848
        [<ffff00000823fae4>] SyS_ioctl+0x8c/0xa8
        [<ffff000008083ac0>] el0_svc_naked+0x34/0x38
        [<ffffffffffffffff>] 0xffffffffffffffff
    Signed-off-by: default avatarXulin Sun <xulin.sun@windriver.com>
    Signed-off-by: default avatarAlexandre Belloni <alexandre.belloni@bootlin.com>
    9bde0afb