HID: intel_ish-hid: Add check for ishtp_dma_tx_map

stable inclusion
from stable-v4.19.272
commit cc906a3a4432da143ab3d2e894f99ddeff500cd3
category: bugfix
bugzilla: https://gitee.com/src-openeuler/kernel/issues/I7FCLX
CVE: CVE-2023-3358

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=722c156c6eab40a6e7dda98dfa66724f9d5aeceb



--------------------------------

[ Upstream commit b3d40c3e ]

As the kcalloc may return NULL pointer,
it should be better to check the ishtp_dma_tx_map
before use in order to avoid NULL pointer dereference.

Fixes: 3703f53b ("HID: intel_ish-hid: ISH Transport layer")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Cai Xinchen <caixinchen1@huawei.com>
Reviewed-by: GUO <Zihua&lt;guozihua@huawei.com>
Reviewed-by: GONG, Ruiqi <gongruiqi1@huawei.com>
Reviewed-by: Wang Weiyang <wangweiyang2@huawei.com>
Signed-off-by: Yongqiang Liu <liuyongqiang13@huawei.com>