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Tue, 15 Apr 2025 14:24:46 +0000 (GMT) From: Harald Freudenberger To: dengler@linux.ibm.com, ifranzki@linux.ibm.com, fcallies@linux.ibm.com, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, seiden@linux.ibm.com Cc: linux-s390@vger.kernel.org, herbert@gondor.apana.org.au Subject: [PATCH v5 17/25] s390/zcrypt: Locate ep11_domain_query_info onto the stack instead of kmalloc Date: Tue, 15 Apr 2025 16:24:30 +0200 Message-ID: <20250415142438.118474-18-freude@linux.ibm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250415142438.118474-1-freude@linux.ibm.com> References: <20250415142438.118474-1-freude@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: 5lTtUT_oM49VFx9McBVwNFJYTtM2wEXM X-Proofpoint-GUID: 5lTtUT_oM49VFx9McBVwNFJYTtM2wEXM X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1095,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-04-15_06,2025-04-15_01,2024-11-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 impostorscore=0 priorityscore=1501 mlxscore=0 clxscore=1015 adultscore=0 bulkscore=0 lowpriorityscore=0 suspectscore=0 mlxlogscore=950 spamscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2502280000 definitions=main-2504150099 Locate the relative small struct ep11_domain_query_info variable onto the stack instead of kmalloc()/kfree(). Signed-off-by: Harald Freudenberger Reviewed-by: Holger Dengler --- drivers/s390/crypto/zcrypt_ep11misc.c | 25 ++++++++++--------------- 1 file changed, 10 insertions(+), 15 deletions(-) diff --git a/drivers/s390/crypto/zcrypt_ep11misc.c b/drivers/s390/crypto/zcrypt_ep11misc.c index ba8f2f272cd4..a7004fa46035 100644 --- a/drivers/s390/crypto/zcrypt_ep11misc.c +++ b/drivers/s390/crypto/zcrypt_ep11misc.c @@ -702,36 +702,31 @@ int ep11_get_domain_info(u16 card, u16 domain, struct ep11_domain_info *info) u8 new_WK_VP[32]; u32 dom_flags; u64 op_mode; - } __packed * p_dom_info; - - p_dom_info = kmalloc(sizeof(*p_dom_info), GFP_KERNEL); - if (!p_dom_info) - return -ENOMEM; + } __packed dom_query_info; rc = ep11_query_info(card, domain, 0x03 /* domain info query */, - sizeof(*p_dom_info), (u8 *)p_dom_info); + sizeof(dom_query_info), (u8 *)&dom_query_info); if (rc) goto out; memset(info, 0, sizeof(*info)); info->cur_wk_state = '0'; info->new_wk_state = '0'; - if (p_dom_info->dom_flags & 0x10 /* left imprint mode */) { - if (p_dom_info->dom_flags & 0x02 /* cur wk valid */) { + if (dom_query_info.dom_flags & 0x10 /* left imprint mode */) { + if (dom_query_info.dom_flags & 0x02 /* cur wk valid */) { info->cur_wk_state = '1'; - memcpy(info->cur_wkvp, p_dom_info->cur_WK_VP, 32); + memcpy(info->cur_wkvp, dom_query_info.cur_WK_VP, 32); } - if (p_dom_info->dom_flags & 0x04 || /* new wk present */ - p_dom_info->dom_flags & 0x08 /* new wk committed */) { + if (dom_query_info.dom_flags & 0x04 || /* new wk present */ + dom_query_info.dom_flags & 0x08 /* new wk committed */) { info->new_wk_state = - p_dom_info->dom_flags & 0x08 ? '2' : '1'; - memcpy(info->new_wkvp, p_dom_info->new_WK_VP, 32); + dom_query_info.dom_flags & 0x08 ? '2' : '1'; + memcpy(info->new_wkvp, dom_query_info.new_WK_VP, 32); } } - info->op_mode = p_dom_info->op_mode; + info->op_mode = dom_query_info.op_mode; out: - kfree(p_dom_info); return rc; } EXPORT_SYMBOL(ep11_get_domain_info); -- 2.43.0